Based on [Buford's] extensive history of malapropisms, I would say that he is talking about the Chupacabra, the Latin American goat sucker, that is said to haunt the deserts of Mexico and South-Western America.

”

— Baljeet

The boys set out to prove the existence of the elusive Chupacabra to the world, but Candace can't stand the wait and first just needs to prove it to Mom. Meanwhile, Doofenshmirtz has the brilliant idea to use his Switch-Place-Inator to remove hair from one person and give it to another so that he can in turn sell his hair growing tonic.

Contents

Episode Summary

After Phineas and Ferb cross something off their "bucket list", Buford enters, dressed as Isabella. He asks them, "What'cha doin'?" and Phineas says the real question is what Buford is doing. Buford explains he's filling in for Isabella while she's visiting her grandparents in New Mexico. Baljeet adds the dress was his idea. Buford recalls his Great Grandfather's experiences in New Mexico. His grandpa was herding cattle when suddenly the legendary "Chappy-cobra" slinks by. Baljeet figures Buford means the Chupacabra, a mythical beast believed to attack livestock that lives in the American Southwest. Phineas says that the Chupacabra is fake like the Lake-Nose Monster or the Klimpaloon. Baljeet points out that they have already discovered those things. Phineas realizes that they have, and announces that today they are going to search for the El Chupacabra. He then wonders where Perry is.

Carl hosting the Sensitivity training

At O.W.C.A. Headquarters, Carl thanks the animal agents for coming to Sensitivity Training. He then releases all animals, leaving Major Monogram as the only one left. Offended, he remarks that he doesn't need the training because humans are a higher species, causing every agent to growl at him. Carl remarks that that is why they are here today.

Candace, with Stacy's help, goes through her wardrobe. Candace complains that all of her outfits are jinxed, for every outfit has been worn when something bad happens to her. For example, she wore one when the Gelatin Monster ate her, and wore another when she was "split into like fifty of [her] self" and yet another from "the wholeMeap thing." The computer then scans Candace. "Rooting. Sniffing. Long Neck. Not Desert Dwelling. Not Chupacabra." As for Candace, it suddenly dawns on her that someone's judging her and sees the chupa-copter fly away. She yells and informs Phineas and Ferb that they are so busted as they fly off.

Perry arrives at Doofenshmirtz Evil Incorporated where he sees a biplane parked on the balcony. Dr. Doofenshmirtz traps Perry in a barber's chair and tells him his daily evil scheme. He had invented a spray that allows you to grow back hair if you lose it all. The advertisement for it makes it sound like it grows hair on one's back, so it hadn't been selling. Doof is now going to use his new Switch Place-inator to switch to take people's switch someone hair with a bald head so that everyone would want to buy Get Back Hair. He thens shows it off by switching Perry places with a shark in a tank. Perry jumps out of the tank to Doof's surprise. The shark tries to eat Dr. Doofenshmirtz and he throws it off. He then switches the shark tank places with a light fixture. The tank fall from the ceiling and lands upside down, trapping Agent P inside.

The gang arrives in New Mexico. They lower Buford in the goat costume from the bottom of the Chupa-Copter. Baljeet steers the vessel to crash Buford into some cacti.

Doofenshmirtz flies away on the Biplane, but quickly realizes he left it at his building. Perry uses the Switch Place-Inator to teleport himself on the plane. They both climb on top of the Biplane and a very odd battle ensues. the audience can hear them fighting whenever they are off-screen, and whenever they are on-screen, they have engaged themselves in some activity, such as fishing or Doofenshmirtz teaching Perry how to ride a tricycle.

Doof and Perry fighting

Candace runs to the backyard to wait for the "Bust-ees" to return. Stacy asks if her services are needed, and after no answer she decides to leave.

In New Mexico, the boys search for the Chupacabra. Buford exclaims that he thinks he has found something. The computer confirms it. The Chupacabra chases Buford but falls in a pit. Everyone looks at the mysterious creature. Phineas remarks that now they have to take him home.

The Chupacabra

The gang arrives home. The Chupacabra is in a crate, and is scraping to get out. The quartet decides the creature is hungry, and Phineas and Ferb decide to see if there is any goat-based food in the fridge. Candace jumps out from behind the tree. She peeks in the crate and the monster attacks her. She jolts back, and remarks that this is the best day ever. She moves it to the front yard and calls Linda.

Phineas and Baljeet find some Chupacabra food in their fridge, and remark that Linda's cooking classes are coming in handy. Linda pulls into the driveway. The gang goes in the backyard and realizes that the Chupacabra is gone. Phineas notes this must be how Candace feels when the gang's creations disappear.

On the biplane, Perry ejects Doofenshmirtz's parachute, pulling him off the plane. As Perry is about to destroy the Inator, Major Monogram calls through the wristwatch communicator. Major Monogram informs Perry that Agent CH, the Organization Without a Cool Acronym's New Mexico operative, has had his cover compromised and captured by Phineas and Ferb. Perry pilots the plane towards the yard. Carl tells Monogram to keep writing, and we see that Major Monogram had written "Animals are People Too!" multiple times on a chalkboard.

Candace tries to show Linda the Chupacabra as she get groceries from the trunk. Perry flies by on the plane and shoots two lasers from the Switch Place-inator, one at the Chupacabra, and one at something off screen. Candace opens up the crate to show her sarcastic mother the Chupacabra, but, due to the inator's blast, Buford comes out of the crate instead, much to his own confusion. Linda is at least glad he's gonna finish up her leftover biryani to which he gladly accepts. Candace begins to stutter, her busting plot once again foiled.

The Chupacabra, aka Agent CH, waves to Perry and flies off in the Chupa-Copter. Phineas, Ferb, and Baljeet come in the yard. They tell Perry that they had caught the Chupacabra, but as they scroll through the pictures, they realize they had either missed the Chupacabra, or had their thumbs in the way. Ferb remarks that "maybe the universe doesn't want some things photographed, like Chupacabras". He pauses, and adds, "And photographs where everybody has their eyes open."

The "Too Young" Line

Ferb's Line

What'cha doin'?

Buford: Hey guys, what'cha doin'?

Phineas: Uh, I think the bigger question is: What are you doing, Buford?Buford: I'm filling in for Isabella while she's visitin' her grandparents in New Mexico.Baljeet: The dress was all his idea, though.

Buford: Hey, I got the legs for it!

Perry's entrance to his lair

None; he was already in the O.W.C.A. Animal Sensitivity Seminar.

Oh, there you are, Perry

Phineas: I don't get it. He usually shows up by now. Oh, there you are Perry. You'll never believe this, but for a while there, we had a real, live Chupacabra.

Carl: I-Is this thing on? I want to thank you all for taking some time outta your busy schedules to attend our compulsory O.W.C.A. Animal Sensitive Seminar. However, if you currently are an animal, you may be excused to your missions.

(The animals leave)Major Monogram: What -- what -- what? They get to go? What is this, Pick On the Higher Species Day?(The animals turn around and make angry noises)Major Monogram: What? Humans are a higher species, everybody knows that!

Candace said she was split into fifty, but she was actually split into thirteen (two at first, eleven more later). She could have been exaggerating.

Phineas said that he, Ferb and Baljeet took pictures with their smartphones (which only show their thumbs, parts of the chupacabra or nothing at all), but they didn't take out their smartphones to take pictures during the adventure.

When Ferb is looking at the photos on his smartphone, he goes through photos 3 through 6, then goes back to 3. He should have gone back to 1.

When Doofenshmirtz calls Perry Señor pantalones inteligente (Mister smarty pants), he should have said Señor pantalones inteligentes, to have the noun and adjective agree in number. But then again, Doofenshmirtz is not very bright, so he might not have known that.

Phineas mentions the Lake Nose Monster, but he and Ferb were supposed to keep it secret.

The beam from the Switch Place-inator somehow gets into the house and into the crate.

The desert landscape is decidedly Arizona in origin. New Mexico does not have Bluffs or Socorro cactus.

The photos of El Chupacabra end up being the boys' thumbs covering the lens, just like Candace's photo in "Raging Bully" and Irving's imaginary pictures in "Atlantis", as well as Linda's wedding photo in "Mom's Birthday".